Type-writer platen.



c. .w. BAHNABL TYPE WRITER FLA-TEN.

APPLICATION FILED SEPT. 23' 1913- 1 86,268. Patented June 6, 1916.

WITNESSES:

- ATTORNEYS 1 To all whom it may concern: A

strarnsra.

- ICE.

CHARLES W. nsnuanxon NEW YonKf-fi kf 'rirrn wnrrnn rna'rnn.

Be it known that I, CHARLES W. :BARNABYJ,"

a citizen of the United States, residing in the borough of Richmond,county of Richmond, city 'of New York, and State of New. York, haveinvented certain new and useful Improvements in Type-WriterPlatens,ofwhich the following is a full and clear. specification. Thisinvention relates to mounts and driving connections; for 'typewriterplatens and has for its prlmary object to provide:a IIlOllIlt'Ofimproved construction which Wlll permit the employment of a platen whichdoes not limit the width of the sheet upon which the writing is to berecorded.

Another object is to provide an improved mount of thischaracter whichwill permit a ready exchangeof platens or ifdesired, per mit'o'f mailingtubes and other cylindrical bodies being installed in lieu of the"regular platen, thus making it possible tp writedi- 'r'ectly uponanarticle -of'this character.

Another object isto provide an improved .hand operated connection,including a-handle which is adjustable laterally to make it readilyaccessible for sheets of various sizes. Other and further'objects willappear in the specification and be pointed out. in the appended claims IThe preferred embodiment of my invention is. shown on the accompanyingdrawings,in which,

Figure 1 is a r'ar elevation of a.typewriter carriage which is'providedwith my improved platen .mount and platen operating connections. Fig. 2-is an end elevationof the same taken from the right of Fig. 1, with theratchet wheel removed. Fig. 3 is an end elevation of another embodimenttaken from the left end of Fig. 4. Fig. i is a front elevation of. thisembodiment.

Fig. 5 is another end elevation of the same taken from the right end ofFig. 1.

Inthe embodiment of my invention shown on the drawings, the carriageframe comprises a plurality of longitudinal members 1 and 2 and a pairof laterally spaced end frames 3 which are rigidly secured to saidlongitudinal members. provided with a roller 1 journaled on the screw 5.A rack bar 6 is also rigidly secured to the end frames 3 and constitutesone of the longitudinal members of the carriage .frame.

Journaled within .the end frames 3 are plurality of rollers 7 and 8, theformer 4 Specification cf Letters Patent. ".Patented Jflne 6,1916. 7Application and September 2a, 1913. Serial 30,181,333. a

said body or platenbeing in-this manner-f .rotated on its axislO. aSuch'body may be 'body upon which-it is desired to imprint a means forretaining the bo dyorplaten 9 in vided by the pressure rollers 11.According disposed adjacent the ends of the platen or i The member 1isto the present. embodiment of my invention, two of these rollers whichare preferably cylindrical body. 9, are journaled upon pins 12 which arecarried by" the forked u per ends of resilient arms 13, the lower-en sof said arms being" rigidly secured to laterally projecting branches ofthe 'end frames 3. 7.5

-There is thus provided a resili'ent pressure tending to maintain the,body'or platen 9 in sultable position to beprinted upon while at thesame time maintaining the required degree of pressure'between said bodyor platen Stand the. supporting rollers 7 and 8. As shown in Fig.2 and3, the rollers 7 and 8 are provided with end journals 14: by means ofwhicli they are rotatably mounted in the end frames 3. Secured to theright hand journals of the rollers 7 and 8, accord ing to Fig.1,aregearslfi and 16. The gear 15 lntermeshes with. a driving gear 17which as shown is keyed to a hollow shaft 18 which is journaled atopposite ends within the end frames 3. Also keyed to the hollow shaft18- is a ratchet wheel 19 which is adapted to be rotated by anysuitable'linespaclng mechanism (not shown on the drawings) Extendinglongitudinally of the hol- 3:35

low shaft 18 is a slot'20 within which the pins or screws 21 are adaptedto reciprocate as the extensible handle now to be described, A

is moved inwardly and outwardly. .Said

handle comprises a rod 22 which-telescopes within the hollow shaft 18and a hand or finger grip 23 whichis secured to the rod 22.

Sliclably' mounted on the hollow shaft 18 is.

a band or ring 24; which is rigidly connected to the rod 22' by meansofthe pins or screws 21. By this means, the hollow shaft 18 may berotated byhand by gripping the hand or. finger grip As shown best inFig. 2,

,power is"transmitted.from the gear 17 to the gear 16 on therear platenroller 7, by means offinterposed idlers 3% According .to the fifil i dllfl .1 I my ,ention shown in Fig 3, at and 5, a platen 26 is made openat one end and closed at the other. Thus the shaft 27 which supports theplaten 26 at one end,

is journaled in an end frame 28 and is provided with a ratchet wheel 29and a hand grip 30. Secured to the end frame 28 is a resilient finger 31which cooperates with another resilient finger 32, which is secured tothe opposite end frame 33 in resilientl holding the platen 26 againstthe supporting rollers 7 and 8, which are journaled at opposite endswithin the end frames 28 and 33. Said end framesv are secured togetherby means of rack bar 3%, tie bar 35 and longitudinal member 36, whichcarries the roller 37.

The advantages and method of manipulating my improved construction willnow be readily understood and briefly referred to, are as follows:According to the embodiment shown in Figs. land 2, end pivots andbearings are dispensed with entirely, the platen or other body which issuitable to be rotated by the supporting rollers 7 and 8 ing centeredand rotatedby said rollers under the required degree of pressure forsecuring the.best results in making a record thereon.

Instead, therefore, of providing similar rolls for merely holdingthe'paper to the platen, I employ these rollers to drive the platen andat the same time provide an open end platen which permits a sheet ofindefinite width to be employed in the machine. In order to make thehand grip on the hand operating feed rod 22, readily accessible for anywidth of paper which may be used, it is made extensible in the mannerhereinabove pointed out, so that said hand grip can be made to projectbeyond the lat oral edge of the sheet and thereby adapted to be operatedwithout inconvenience. By means of this construction, that is byomitting the end pivots, bearings and handles, I can employ aplaten orbody of similar form of indefinite length. Or if desired, the extremelength of the platen and its housing can be reduced to a minimum tocorrespond to a minimum width of the main frame which will house astandard keyboard, thus making it possible to materially reduce thewidth of typewriting machines without any reduction in their capacity. Afurther ad vantage is that the platen is readily removed and replacedwhen desired, a very simple manipulation being required for this purp Inthis connection it will be seen that a simple and eiiicientmeans forreplacing a platen at any time by one of softer or harder material,"according to the requirements of one lrinds of work, is provided. Thisconstruction is convenient for the subion of mailing tubes or for maki ga long envelope or other articles at .1 upon which. extend aunt beyondhe confines 13, .r hilt;

machine. In the embodiment shown in Figs. 8, l and 5, the overhang ofthe sheet or other body to be written upon is confined to one end of theplaten instead of being arranged to overhang on. both ends as ispossible with the embodiment shown in Figs. 1 and Q. i do notspecifically claim the embodiment shown in Figs. 3, 4 and 5 in thepresent application as such embodiment constitutes the subject matter ofmy division application being suitably arranged to center a platen orthe like with respect to an axis about which said platen or the like isto rotate, a platen or the likejournaled freely upon and supportedentirely by said rolls and means for applying power to one of said rolls1ndependently of said platen or the like for driving said platen or thelike.

2. In a machine of the character de scribed, a carriage provided withrolls suit ably mounted to center a platen or the like with respect toan axis about which it is to rotate, a platen or the like freelyjournaled on and supported entirely by said rolls and means connectingsaid rolls independently of said platen or the like for driving saidrolls in unison.

3.111 a machine of the character described, a carriage providedwithrolls suit ably mounted to center a platen or the like with respect toan axis about which it is to rotate, a platen or the like freelyjournaled on and supported entirely by said rolls, and means connectingsaid rolls independently of said platen or the like for driving saidrolls in unison, said rolls being journaled in bearings rigid on saidcarriage.

4. In a machine of the character de scribed, a movable carriage, aplaten or the like, rolls for carrying the entire weight of said platenor the like, said rolls being in peripheral running contact with saidplaten or the like, and bearings rigid with said carriage and withinwhich said. rolls are journaled, the axes of said rolls being arrangedbelow the axis of rotation of said platen or the like.

In a machine of the character de scribed, the combination with n aplaten, rolls iournaled in said peripherally contacting rotatabi" Iuport it ting salt rolls being geared together independently of saidpaiteii to move in unison for driving said platen.

(Q. In a typewriting machine, the combina tion with a movable carriage,of a platen. said carriage. being suitably formed to per init a sheet ofpaper on said platen to overhang the carriage at either end, rolls journaled in said carriage on axes below the axis of said platen. saidplaten being supported entirely by said rolls and in peripheral contacttherewith. means for driving said rolls to rotate said platen, and ahandle operatall connected to said platen and adjustable lengthwisethereof to aceonnnodate paper of ;j reater width than the length of saidplaten.

7. In a machine of the character described, the combination, with acarriage, of a platen, rolls journaled in said carriage below andperipherally contacting with said platen, said rolls bearing the entireWeight of said platen to adapt it to carry a sheet of greater width thanthe length of said platen, and a platen rotating handle operatablyconnected to said platen and adjustable lengthwise thereof to extendoutside of the lateral edge of said sheet.

CHARLES W. BARNABY. 'itne sses "11. A. (JOURTLAND, A. O. KNIGHT.

@epies c this patent may be obtained for an cents each, by addressingthe "Commissioner of Fatentn.

Washington, D. C."

